Alright /b i need some advise in how to ruin a hookah lounge...

Play really loud arab music with a speaker facing your front door. The neighbours will call the Cops and when they show hide the speakers. Play that shit LOUD

Anyway guys. Thanks for your support i gotta go to work now 5 am here in germany . If i do stuff i will definetly post it here

You could actually do a modification of what the guy offered.
Atleast inviting people to the hookah bar for some convention. (people that arabs would hate; blacks, gays, other arabs etc)
Do it often, do it online, use VPN and never admit. You can get cockroaches in their place at night from under the door.
Wear a hoodie and don't go straight home after doing that.
Leave their address and number for a "viewing" best done if you go to a ghetto and leave PRINTED PAPER there on some pole. Mention a believable rent and that the place will be rented out for 6 months and its an open viewing so anyone can come. Free coffee too.
Make surenl you look out for cameras anywhere you put those up.
Whatever you do, be safe and don't tell anything to anyone you know in real life no matter how proud you feel.

Gonna leave now. If you made any progress, let us know over here. If it's something major, use a VPN and please be safe.

By some fish and some beef, wrap it up and hide it in your clothes or in a bag (maybe have a female friend with a purse do this), and go in as a customer, sit down and smoke some hookah, and then hide the fish and beef in spots where they won't be found for a while (under seat cushions, maybe tape it under a table, if the bathroom has movable ceiling tiles, put them up there, etc)

The place will stink like fucking shit within a few days, and it'll take em a while to figure out why.